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=== tests/cases/compiler/typeParameterConstraintInstantiation.ts ===
// Check that type parameter constraints are properly instantiated
interface Mapper<T> {
map<U extends T, V extends U[]>(f: (item: T) => U): V;
>map : <U extends T, V extends U[]>(f: (item: T) => U) => V
>f : (item: T) => U
>item : T
}
var m: Mapper<string>;
>m : Mapper<string>
var a = m.map((x: string) => x); // string[]
>a : string[]
>m.map((x: string) => x) : string[]
>m.map : <U extends string, V extends U[]>(f: (item: string) => U) => V
>m : Mapper<string>
>map : <U extends string, V extends U[]>(f: (item: string) => U) => V
>(x: string) => x : (x: string) => string
>x : string
>x : string
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